The Reinforced Ratio

Installed in a Pit Well or Surface Mount,

the Floor Must Include the Proper Concrete to Rebar Ratio

reinforced ratio

This is not from Sheldon’s whiteboard on The Big Bang Theory. This is the concrete to rebar ratio which much be considered when installing a lift table whether in a pit well or surface mounted.

concrete pit

Many applications will require that a lift table be installed into a concrete pit. Alfacon Solutions’ engineers help to first consider the pit’s overall dimensions. To start, the width and length, a 1″ gap around the perimeter of the platform, must remain; between the edge of the deck and edge of the pit wall must remain as well.

The overall pit width and length will be the platform width + 2″ and the platform length + 2″. This is for a lift table with no hinged bridges. Once the manually operated hinged bridge is added, an additional inch of clearance between the edge of the platform and the edge of the pit wall for each hinged bridge are required allowing space for the hinge spools and other elements. This additional gap requirement increases when utilizing a hydraulic hinged bridge. This space allows the cylinder to extend the bridge.

The next consideration is the depth of the pit. Alfacon recommends cutting the pit to the fully lowered height of the lift table, plus an additional 1/4″, to ensure that the table does not stick out of the pit. It is much better to shim a table slightly to bring it up to floor height then it is to try to rework a pit because the equipment has a slight projection.

Next, customers must consider any conduit requirements, such as hydraulic conduits. The location of the power unit must be considered, located remotely, outside of the pit, or self-contained, and installed in the pit under the equipment. For remote power unit installations, a conduit to run the pressure and bypass hydraulic lines from the power unit to the cylinders under the table will be required. This will not be required if using a self-contained power unit.

Alfacon sample scissor lift pit

Sample client scissor lift pit

John Murdoch
John Murdoch is CEO of Alfacon Solutions Ltd., based in Canada. Murdoch is a thought-leader in both the manufacturing and materials handling sectors. Leveraging more than a quarter century of experience, Murdoch brings a unique perspective to engineered material handling solutions and the role of automation. Murdoch can be reached at